Abstract
Abstract Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip. A major advantage of drip is the ability to fertigate and apply fertilizers directly through the irrigation water. A series of studies were conducted in western Oregon, USA to identify the best practices for applying N and other nutrients by fertigation. Fertigation with various fluid NH4-N sources, including ammonium sulphate, urea, and urea sulfuric acid, produced more growth and greater yield than conventional granular fertilizers in ‘Buecrop’ blueberry. Furthermore, applying humic substances in combination with N fertigation nearly doubled root production during the first 2 years after planting. To apply other nutrients, soluble potassium sulphate and potassium thiosulfate are good sources for fertigation in blueberry. Both fertilizers had an immediate effect on availability of K and other nutrients in the soil solution and after 2 years increased the nutrient status of ‘Duke’ blueberry. However, whether applied by fertigation or as a granular product, there was no benefit to fruit production at sites with sufficient soil K. Phosphorus fertilizers also had no effect on mineral nutrition or fruit production, even under P-limited conditions, in ‘Duke’ or ‘Bluecrop’. In this case, the soil was high in clay and likely bound much of the P. The use of B fertilizers, on the other hand, increased the concentration of B in the leaves and fruit of ‘Earliblue’ and ‘Elliott’ blueberry, particularly when it was applied by fertigation or as a foliar fertilizer. Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’ but increased fruit firmness of ‘Elliott’ blueberry, particularly in cold storage. Given its potential benefits on fruit quality, we will continue to test fertigation with Ca fertilizers in conventional and organic blueberry fields.
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Claims 18
Claim · model-written summary
Fertigation with fluid NH4-N sources increased growth of Buecrop blueberry relative to conventional granular fertilizers.
- Taxon
- highbush blueberry
Vaccinium corymbosume0 - Material
- ‘Buecrop’e1
- Treatment
- Fertigation with various fluid NH4-N sourcese1
- Outcome
- growthe1
- Direction
- moree1
- Comparator
- conventional granular fertilizerse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with various fluid NH4-N sources, including ammonium sulphate, urea, and urea sulfuric acid, produced more growth and greater yield than conventional granular fertilizers in ‘Buecrop’ blueberry”
Claim · model-written summary
Fertigation with fluid NH4-N sources increased yield of Buecrop blueberry relative to conventional granular fertilizers.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Buecrop’e1
- Treatment
- Fertigation with various fluid NH4-N sourcese1
- Outcome
- yielde1
- Direction
- greatere1
- Comparator
- conventional granular fertilizerse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with various fluid NH4-N sources, including ammonium sulphate, urea, and urea sulfuric acid, produced more growth and greater yield than conventional granular fertilizers in ‘Buecrop’ blueberry”
Claim · model-written summary
Applying humic substances with N fertigation nearly doubled root production during the first 2 years after planting.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Treatment
- applying humic substances in combination with N fertigatione1
- Outcome
- root productione1
- Direction
- nearly doublede1
- Qualifier
- during the first 2 years after plantinge1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“applying humic substances in combination with N fertigation nearly doubled root production during the first 2 years after planting”
Claim · model-written summary
Soluble potassium sulphate and potassium thiosulfate are recommended as good sources for fertigation in blueberry.
Verbatim
e0“soluble potassium sulphate and potassium thiosulfate are good sources for fertigation in blueberry”
Claim · model-written summary
Soluble potassium sulphate and potassium thiosulfate had an immediate effect on availability of K and other nutrients in the soil solution.
- Taxon
- blueberrye0
- Treatment
- soluble potassium sulphate and potassium thiosulfatee0
- Outcome
- availability of K and other nutrients in the soil solutione1
Not reportedComparatorDirection
Verbatim
e0“soluble potassium sulphate and potassium thiosulfate are good sources for fertigation in blueberry”
e1“Both fertilizers had an immediate effect on availability of K and other nutrients in the soil solution”
Claim · model-written summary
Soluble potassium sulphate and potassium thiosulfate increased the nutrient status of Duke blueberry after 2 years.
- Taxon
- blueberrye0
- Material
- ‘Duke’e1
- Treatment
- soluble potassium sulphate and potassium thiosulfatee0
- Outcome
- nutrient statuse1
- Direction
- increasede1
- Qualifier
- after 2 yearse1
Not reportedComparator
Verbatim
e0“soluble potassium sulphate and potassium thiosulfate are good sources for fertigation in blueberry”
e1“after 2 years increased the nutrient status of ‘Duke’ blueberry”
Claim · model-written summary
Potassium applied by fertigation or as a granular product gave no benefit to fruit production at sites with sufficient soil K.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Treatment
- applied by fertigation or as a granular producte1
- Outcome
- fruit productione1
- Direction
- no benefite1
- Qualifier
- at sites with sufficient soil Ke1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“whether applied by fertigation or as a granular product, there was no benefit to fruit production at sites with sufficient soil K”
Claim · model-written summary
Phosphorus fertilizers had no effect on mineral nutrition of Duke blueberry, even under P-limited conditions.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Duke’e1
- Treatment
- Phosphorus fertilizerse1
- Outcome
- mineral nutritione1
- Direction
- no effecte1
- Qualifier
- even under P-limited conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Phosphorus fertilizers also had no effect on mineral nutrition or fruit production, even under P-limited conditions, in ‘Duke’ or ‘Bluecrop’”
Claim · model-written summary
Phosphorus fertilizers had no effect on fruit production of Duke blueberry, even under P-limited conditions.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Duke’e1
- Treatment
- Phosphorus fertilizerse1
- Outcome
- fruit productione1
- Direction
- no effecte1
- Qualifier
- even under P-limited conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Phosphorus fertilizers also had no effect on mineral nutrition or fruit production, even under P-limited conditions, in ‘Duke’ or ‘Bluecrop’”
Claim · model-written summary
Phosphorus fertilizers had no effect on mineral nutrition of Bluecrop blueberry, even under P-limited conditions.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Bluecrop’e1
- Treatment
- Phosphorus fertilizerse1
- Outcome
- mineral nutritione1
- Direction
- no effecte1
- Qualifier
- even under P-limited conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Phosphorus fertilizers also had no effect on mineral nutrition or fruit production, even under P-limited conditions, in ‘Duke’ or ‘Bluecrop’”
Claim · model-written summary
Phosphorus fertilizers had no effect on fruit production of Bluecrop blueberry, even under P-limited conditions.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Bluecrop’e1
- Treatment
- Phosphorus fertilizerse1
- Outcome
- fruit productione1
- Direction
- no effecte1
- Qualifier
- even under P-limited conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Phosphorus fertilizers also had no effect on mineral nutrition or fruit production, even under P-limited conditions, in ‘Duke’ or ‘Bluecrop’”
Claim · model-written summary
B fertilizers increased the B concentration in leaves and fruit of Earliblue blueberry, particularly when applied by fertigation or as a foliar fertilizer.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Earliblue’e1
- Organ / stage
- leaves and fruite1
- Treatment
- B fertilizerse1
- Outcome
- concentration of Be1
- Direction
- increasede1
- Qualifier
- particularly when it was applied by fertigation or as a foliar fertilizere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“The use of B fertilizers, on the other hand, increased the concentration of B in the leaves and fruit of ‘Earliblue’ and ‘Elliott’ blueberry, particularly when it was applied by fertigation or as a foliar fertilizer”
Claim · model-written summary
B fertilizers increased the B concentration in leaves and fruit of Elliott blueberry, particularly when applied by fertigation or as a foliar fertilizer.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Elliott’e1
- Organ / stage
- leaves and fruite1
- Treatment
- B fertilizerse1
- Outcome
- concentration of Be1
- Direction
- increasede1
- Qualifier
- particularly when it was applied by fertigation or as a foliar fertilizere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“The use of B fertilizers, on the other hand, increased the concentration of B in the leaves and fruit of ‘Earliblue’ and ‘Elliott’ blueberry, particularly when it was applied by fertigation or as a foliar fertilizer”
Claim · model-written summary
Fertigation with Ca products had little effect on Ca in the leaves or fruit of Duke blueberry.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Duke’e1
- Treatment
- Fertigation with Ca productse1
- Outcome
- Ca in the leaves or fruite1
- Direction
- little effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’”
Claim · model-written summary
Fertigation with Ca products had little effect on Ca in the leaves or fruit of Earliblue blueberry.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Earliblue’e1
- Treatment
- Fertigation with Ca productse1
- Outcome
- Ca in the leaves or fruite1
- Direction
- little effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’”
Claim · model-written summary
Fertigation with Ca products had little effect on Ca in the leaves or fruit of Bluecrop blueberry.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Bluecrop’e1
- Treatment
- Fertigation with Ca productse1
- Outcome
- Ca in the leaves or fruite1
- Direction
- little effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’”
Claim · model-written summary
Fertigation with Ca products had little effect on Ca in the leaves or fruit of Aurora blueberry.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Aurora’e1
- Treatment
- Fertigation with Ca productse1
- Outcome
- Ca in the leaves or fruite1
- Direction
- little effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’”
Claim · model-written summary
Fertigation with Ca products increased fruit firmness of Elliott blueberry, particularly in cold storage.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Material
- ‘Elliott’e2
- Treatment
- Fertigation with Ca productse1
- Outcome
- fruit firmnesse2
- Direction
- increasede2
- Qualifier
- particularly in cold storagee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most highbush blueberry (Vaccinium sp.) fields are irrigated by drip”
e1“Fertigation with Ca products, including micronized gypsum and calcium thiosulfate, had little effect on Ca in the leaves or fruit of ‘Duke’, ‘Earliblue’, ‘Bluecrop’, or ‘Aurora’”
e2“but increased fruit firmness of ‘Elliott’ blueberry, particularly in cold storage”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.